Nice, i want to see more, maybe detector mythology, and the mystery of the 'special diodes' and why i they so expensive? Or maybe directional coupler teardowns. Keep it up. You are gifted to explain these things. Cool!
Awesome. So what if a high current, like a garage door keeps surging back into this isolator, what exactly is the part that wears down? Is it terminal C? I seem to have to keep buying a new isolator for my HFC NBN every year or so, and I don't want to keep doing that, so if I know what breaks, then maybe I can buy a good isolator instead of the same cheap ones.
You failed to observe and mention that it appears that the "tabbed" portion of copper leading to the resistor is a bit larger (or extends just a bit more) than the other two "tabs" . . .
I've read a different explanation elsewhere. In it, the waves arriving at the two opposite ports are more or less in phase at one port, and out of phase at the second port. Anything to this? If it were merely the hall effect at work deflecting the current, wouldn't these devices need to be biased to ensure that current is always flowing in the same direction through any given port? And of course that is not possible in a three port device, so it would never work.
An Islator and Circulator are basically the same,the difference is the isolator has the third port terminated within the case, the circulator has the third port connected to an external connector for connection of a terminating load. It is really an issue of the needed load wattage; with a circulator the third port can be connected to a 500w dummy load whereas an isolator has only a limited power capacity wit a fixed terminator.
So for my internet, you're saying I should get a circulator + 500w dummy (whatever that is) instead of the supplied isolator? My isolators seem to always fail after some years, so I have to keep replacing them. Im guessing the garage door in our building keeps frying the isolator somehow by the power go8ing into where all the cables are, or power surges which wear down the isolator over time. If that's how it works, would it be better to get a circulator with this dummy instead?
That is actually a circuator. The part in question, is a small 50 Ohm termination. Magnetic rotation causes the R.F to 'circuate' around to the port 2 connection. The load, is for reflected power sent back down the cable, not back into the transmitter. The magnets 'trap' the R.F, and force it to rotate within the field, to the respective ports. Isolators have separate loads and values according to power handling characteristics and frequency range, I.E: 30 to 100 Watt load terminations for potential feedline problems. Isolators are also harmonic generators. Not great, but they do cause IMD products. DO NOT ATTEMPT TO USE THEM IN ANY RECEIVE SYSTEM!
thank you for the clean, easy explanation
Awesome teardown, visuals and explanation. Thanks!
Thanks for a really easy to understand explanation.
Very nice presentation, please makes more video.
I want to understand "Wilkinson power divider" detailed.
Good stuff! You want to add some theory with mathematics? Would also love more videos with RF explaining components such as this one. :)
Nice, i want to see more, maybe detector mythology, and the mystery of the 'special diodes' and why i they so expensive? Or maybe directional coupler teardowns. Keep it up. You are gifted to explain these things. Cool!
That was a good explaination, thumbs up!
Very good!
More of these explanational movies.
These are perfect!
Awesome. So what if a high current, like a garage door keeps surging back into this isolator, what exactly is the part that wears down? Is it terminal C? I seem to have to keep buying a new isolator for my HFC NBN every year or so, and I don't want to keep doing that, so if I know what breaks, then maybe I can buy a good isolator instead of the same cheap ones.
have you opened the isolators? what's the condition of the ferrites?
You failed to observe and mention that it appears that the "tabbed" portion of copper leading to the resistor is a bit larger (or extends just a bit more) than the other two "tabs" . . .
Outstanding job!
Nice presentation.
Can you do a teardown of fin type RF attenuator?
I've read a different explanation elsewhere. In it, the waves arriving at the two opposite ports are more or less in phase at one port, and out of phase at the second port. Anything to this?
If it were merely the hall effect at work deflecting the current, wouldn't these devices need to be biased to ensure that current is always flowing in the same direction through any given port? And of course that is not possible in a three port device, so it would never work.
If you swapped the poles of the magnent would you effectively reverse the flow?
An Islator and Circulator are basically the same,the difference is the isolator has the third port terminated within the case, the circulator has the third port connected to an external connector for connection of a terminating load. It is really an issue of the needed load wattage; with a circulator the third port can be connected to a 500w dummy load whereas an isolator has only a limited power capacity wit a fixed terminator.
So for my internet, you're saying I should get a circulator + 500w dummy (whatever that is) instead of the supplied isolator? My isolators seem to always fail after some years, so I have to keep replacing them. Im guessing the garage door in our building keeps frying the isolator somehow by the power go8ing into where all the cables are, or power surges which wear down the isolator over time. If that's how it works, would it be better to get a circulator with this dummy instead?
Just curious could this be the same Zeke of OsmocomBB
Hi, You know what ferrite and magnets should I use to make a Circulator, where can I buy
Can you tear down a bias tee?
Witchcraft. Good video, keep it up. Will sub to see whats coming next.
That is actually a circuator. The part in question, is a small 50 Ohm termination.
Magnetic rotation causes the R.F to 'circuate' around to the port 2 connection.
The load, is for reflected power sent back down the cable, not back into the transmitter.
The magnets 'trap' the R.F, and force it to rotate within the field, to the respective ports.
Isolators have separate loads and values according to power handling characteristics and frequency range, I.E: 30 to 100 Watt load terminations for potential feedline problems.
Isolators are also harmonic generators. Not great, but they do cause IMD products.
DO NOT ATTEMPT TO USE THEM IN ANY RECEIVE SYSTEM!
>DO NOT ATTEMPT TO USE THEM IN ANY RECEIVE SYSTEM!
why not?
keep it up bro make more videos :)
only 2 hours?
Nice presentation, but why not really explain the theory of operation?
I work in RF and I can tell you, you can use them at 300 Mhz as well. Given they are not ASICs.
How much was your financial investment?
Rf isolator
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hi